Letter to the Editor: Does physical activity modify the gastroesophageal reflux symptoms independent of obesity? Or obesity confounds the relationship between physical activity and gastroesophageal reflux symptoms?

We read with interest the paper published by Shahid Karim and colleagues on physical activity and its association with gastroesophageal reflux disease. While the aims of the study are to be commended, we have one major and few minor concerns regarding the methodology and interpretations of the findings. Our aim from this letter is to generate a healthy debate and provide scientific evidence to readers not to criticize the authors or their paper.